Ratchet mechanism for a surgical retractor assembly



FIG. 1 is a perspective view of a ratchet mechanism for a surgical retractor assembly showing our new design, the toothed ratchet is shown in broken lines for clarity and forms no part of the invention;

FIG. 2 is a perspective view of the ratchet mechanism for a surgical retractor assembly in the open position;

FIG 3 is a perspective view of the ratchet mechanism for a surgical retractor assembly the pawl in closed position;

FIG. 4 is a sectional view taken along line 4--4 in FIG. 1;

FIG. 5 is a sectional view taken along line 5--5 in FIG. 4; and,

FIG. 6 is an exploded perspective view of the ratchet mechanism for a surgical retractor assembly. 

The ornamental design for a ratchet mechanism for a surgical retractor assembly, as shown and described. 